Question

What does the negative value of E cell indicate

Answer 1

A positive value indicates the oxidation-reduction reaction is a spontaneous reaction. That means without the help of an external agency. Here reduction at the cathode and oxidation at the anode takes place. If it is a negative value, it means only the reverse reaction is spontaneous. It means oxidation at the cathode and reduction at the anode.

Answer 2

Answer:

If the value exists negative, it represents that only the opposite reaction is spontaneous.

Explanation:

If the value exists negative, it represents that only the opposite reaction is spontaneous. It directs to the cathode's oxidation and the anode's reduction. The change in Gibbs free energy in a galvanic cell, where a spontaneous redox reaction causes the cell to produce an electric potential, must be negative.

A positive value denotes the oxidation-reduction reaction that exists as a spontaneous reaction. That indicates without the help of an external agency. Here decrease at the cathode and oxidation at the anode takes place. If it exists a negative value, it means only the reverse reaction is spontaneous. It indicates oxidation at the cathode and reduction at the anode.

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